CN114698654B - Plant source synergistic agent, plant source herbicide and application thereof - Google Patents
Plant source synergistic agent, plant source herbicide and application thereof Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/08—Magnoliopsida [dicotyledons]
- A01N65/38—Solanaceae [Potato family], e.g. nightshade, tomato, tobacco or chilli pepper
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/02—Saturated carboxylic acids or thio analogues thereof; Derivatives thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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Abstract
The application relates to the field of pesticides, in particular to a plant source synergistic agent, a plant source herbicide and application thereof. The application discloses a plant source synergist, which contains a medlar extract; in addition, the application also discloses a plant-source herbicide which comprises the sheep fatty acid, a plant-source synergistic agent, a solvent, an emulsifying agent, an antifreezing agent and a carrier. The plant source caproic acid herbicide prepared by adding the plant source synergistic agent medlar extract is safe, environment-friendly and degradable. After the sheep fatty acid is absorbed by weeds, the weeds can not perform photosynthesis by breaking the photosynthetic system membrane of the weeds, so that the weeds are killed. Through tests, 24mL of 25% plant source herbicide caproic acid containing the plant source synergistic agent has the fresh weight inhibition rate of 89.4% under the condition of 120 times dilution, and compared with the fresh weight inhibition rate of 47.2% of the 25% plant source herbicide caproic acid without the synergistic agent, the fresh weight inhibition rate of the caproic acid is obviously improved.
Description
Technical Field
The application relates to the field of pesticides, in particular to a plant source synergistic agent, a plant source herbicide and application thereof.
Background
Long-term application of chemical herbicides necessarily results in the emergence of weed resistance, with certain environmental risks. Development of a broad-spectrum, efficient and low-toxicity novel green herbicide, especially development of biological weeding, is a key to solving the problem. The development of biological herbicides is an important basis for replacing and reducing the use of chemical herbicides, effectively controlling grass damage, ensuring stable and high yield of crops and guaranteeing food safety and public health; is an important way for reducing chemical herbicide residues, eliminating secondary pollution, improving agricultural ecology and realizing environmental safety and agricultural sustainable development; is a basic requirement and important guarantee for modern organic agriculture production.
Sheep fatty acid, also known as n-octanoic acid, with molecular formula C 8 H 16 O 2 The method comprises the steps of carrying out a first treatment on the surface of the The oily liquid is insoluble in water, belongs to organic acid compounds, and is mainly used for dyes, preservatives and bactericides; the sheep fatty acid is separated and extracted from coconuts in the early stage, and is verified to be a plant source compound with broad-spectrum and high-efficiency weed-suppressing activity, and has the potential of being developed into a plant source herbicide. The synergist is not used per seThe biological activity, but when mixed with a certain pesticide, can greatly improve the toxicity and the drug effect of the pesticide. The most outstanding characteristics are that the effective utilization rate of the pesticide can be obviously improved, the pesticide effect is improved, the wetting, adhesion and spreading capability of the pesticide liquid on the plant body surface or the pest body surface is enhanced, and the rain wash is resisted, so that the pesticide effect is improved. And the preparation method is safe and environment-friendly, and can reduce the cost of stone medicines. At present, no synergist for improving the efficacy of the sheep fatty acid and no report on application exist.
Disclosure of Invention
The application aims to provide a synergist and a method for improving the herbicidal activity of caproic acid, so as to solve the technical problems.
The technical scheme of the application is as follows:
a plant source synergistic agent for improving the herbicidal activity of the caproic acid comprises a medlar extract.
Preferably, the preparation method of the medlar extract comprises the following steps:
(1) Drying the whole Chinese wolfberry, crushing and sieving to obtain a Chinese wolfberry crushed material;
(2) Soaking the ground Chinese wolfberry fruit in water and shaking the ground Chinese wolfberry fruit to obtain an aqueous Chinese wolfberry fruit extract;
(3) Concentrating the fructus Lycii water extractive solution with rotary evaporator to obtain the fructus Lycii extract.
A plant-derived herbicide comprising a sheep fatty acid, a plant-derived synergist, a solvent, an emulsifier, an antifreeze agent and a carrier.
Preferably, the plant-derived herbicide comprises the following components in parts by weight: 20-30 parts of sheep fatty acid, 2-5 parts of plant source synergistic agent, 10-20 parts of solvent, 2-5 parts of emulsifier, 1-6 parts of antifreezing agent and 38-62 parts of carrier.
Preferably, the plant-derived herbicide comprises the following components in parts by weight: 25 parts of sheep fatty acid, 4 parts of plant source synergistic agent, 14 parts of solvent, 5 parts of emulsifier, 3 parts of antifreezing agent and 49 parts of carrier.
Preferably, the solvent is one or more of acetone, ethyl acetate, cyclohexane and cyclohexanone; and/or the emulsifier is one or more of Tween series, alkylphenol ethoxylates, phenethyl phenol ethoxylates, alkylbenzene sulfonic acid calcium salt and fatty alcohol ether sodium sulfate; and/or the antifreezing agent is one or more of glycol, glycerol and isobutanol; the carrier is water.
Preferably, the formulation of the plant-derived herbicide is an aqueous emulsion, an emulsifiable concentrate, a microemulsion or a suspension emulsion.
A method of preparing a plant-derived herbicide comprising the steps of:
(1) Weighing the solvent in a container;
(2) Weighing caproic acid, pouring into the container, and stirring uniformly to obtain a mixed solution A;
(3) Weighing plant source synergistic agent, emulsifying agent and antifreezing agent, placing in another container, pouring into the container, stirring uniformly to obtain mixed solution B;
(4) Uniformly stirring the mixed solution A and the mixed solution B to obtain mixed solution C;
(5) Homogenizing the mixed solution C, adding carrier during homogenizing, and stirring to obtain uniform plant source herbicide with high stability.
The application of a plant source herbicide in the aspect of weed control is provided.
Preferably, the weeds are broadleaf weeds, sedge weeds or grasses.
Preferably, the broadleaf weed is a erigeron breviscapus; grass weeds are goosefoot, semen Euphorbiae and herba Setariae viridis.
The plant source caproic acid herbicide prepared by adding the plant source synergistic agent medlar extract is safe, environment-friendly and degradable. After the sheep fatty acid is absorbed by weeds, the weeds can not perform photosynthesis by breaking the photosynthetic system membrane of the weeds, so that the weeds are killed. Through tests, 24mL of 25% plant source herbicide caproic acid containing plant source synergistic agent has the fresh weight inhibition rate of 89.4% under the condition of 120 times dilution. .
The plant source synergistic agent obviously improves the field prevention and removal effect of the caproic acid on broadleaf weeds, cyperaceous weeds and gramineous weeds, has higher application value on preventing and removing cultivated or non-cultivated weeds, and is a novel plant source herbicide product.
Detailed Description
Embodiments of the present application are described in further detail below with reference to examples. The following examples are illustrative of the application but are not intended to limit the scope of the application. The materials used in the present application are commercially available unless otherwise specified.
The preparation method of the medlar extract in the application comprises the following steps:
(1) Drying and crushing the whole Chinese wolfberry plants, and sieving the dried Chinese wolfberry plants with a 40-60-mesh sieve to obtain Chinese wolfberry crushed materials;
(2) Soaking the ground Chinese wolfberry fruit in water for 24-48 h, and shaking every 8h to obtain an aqueous Chinese wolfberry fruit extract;
(3) Concentrating the medlar water extract by a rotary evaporator under the conditions that the temperature is 45-50 ℃ and the rotation speed is 100-120 rmp, thus obtaining the medlar extract.
Example 1
Plant-derived herbicide containing 20% of sheep fatty acid
20 parts of sheep fatty acid, 2 parts of plant source synergistic agent, 10 parts of solvent, 5 parts of emulsifier, 3 parts of antifreezing agent and 60 parts of carrier.
The preparation method comprises the following steps:
(1) Weighing 10g of acetone in a 1000ml glass cup;
(2) Weighing 20g of sheep fatty acid, pouring into the glass cup and uniformly stirring;
(3) Weighing 2g of plant synergist, placing 5g of Tween 80 and 3g of ethylene glycol into a container, and uniformly stirring while pouring into the container;
(4) Stirring the mixed solution uniformly;
(5) Homogenizing the obtained feed liquid, adding 60g of water in batches during homogenizing, and stirring completely to obtain uniform 20% caproic acid aqueous emulsion with high stability.
Example 2
Plant-derived herbicide containing 20% of sheep fatty acid
20 parts of sheep fatty acid, 3 parts of plant source synergistic agent, 10 parts of solvent, 2 parts of emulsifier, 3 parts of antifreezing agent and 62 parts of carrier.
The preparation method comprises the following steps:
(1) Weighing 10g of acetone in a 1000ml glass cup;
(2) Weighing 20g of sheep fatty acid, pouring into the glass cup and uniformly stirring;
(3) Weighing 3g of plant synergist, placing 2g of Tween 80 and 3g of ethylene glycol into a container, and uniformly stirring while pouring into the container;
(4) Stirring the mixed solution uniformly;
(5) Homogenizing the obtained feed liquid, adding 62g of water in batches during homogenizing, and stirring completely to obtain uniform 20% caproic acid aqueous emulsion with high stability.
Example 3
Plant-derived herbicide containing 20% of sheep fatty acid
20 parts of sheep fatty acid, 4 parts of plant source synergistic agent, 10 parts of solvent, 5 parts of emulsifier, 3 parts of antifreezing agent and 58 parts of carrier.
The preparation method comprises the following steps:
(1) Weighing 10g of acetone in a 1000ml glass cup;
(2) Weighing 20g of sheep fatty acid, pouring into the glass cup and uniformly stirring;
(3) Weighing 4g of plant synergist, placing 5g of Tween 80 and 3g of ethylene glycol into a container, and uniformly stirring while pouring into the container;
(4) Stirring the mixed solution uniformly;
(5) Homogenizing the obtained feed liquid, adding 58g of water in batches during homogenizing, and stirring completely to obtain uniform 20% caproic acid aqueous emulsion with high stability.
Example 4
Plant-derived herbicide containing 25% of sheep fatty acid
25 parts of sheep fatty acid, 3 parts of plant source synergistic agent, 14 parts of solvent, 5 parts of emulsifier, 3 parts of antifreezing agent and 50 parts of carrier.
The preparation method comprises the following steps:
(1) 14g of acetone is weighed into a 1000ml glass cup;
(2) Weighing 25g of sheep fatty acid, pouring into the glass cup and uniformly stirring;
(3) Weighing 3g of plant source synergist, placing 5g of Tween 80 and 3g of ethylene glycol into a container, and uniformly stirring while pouring into the container;
(4) Stirring the mixed solution uniformly;
(5) Homogenizing the obtained feed liquid, adding 50g of water in batches during the homogenizing process, and fully stirring to form a uniform state to obtain the plant source herbicide containing 25% of sheep fatty acid with high stability.
Example 5
Plant-derived herbicide containing 25% of sheep fatty acid
25 parts of sheep fatty acid, 4 parts of plant source synergistic agent, 14 parts of solvent, 5 parts of emulsifier, 3 parts of antifreezing agent and 49 parts of carrier.
The preparation method comprises the following steps:
(1) 14g of acetone is weighed into a 1000ml glass cup;
(2) Weighing 25g of sheep fatty acid, pouring into the glass cup and uniformly stirring;
(3) Weighing 4g of plant source synergist, placing 5g of Tween 80 and 3g of ethylene glycol into a container, and uniformly stirring while pouring into the container;
(4) Stirring the mixed solution uniformly;
(5) Homogenizing the obtained feed liquid, adding 49g of water in batches during the homogenizing process, and stirring thoroughly to obtain uniform plant source herbicide containing 25% of sheep fatty acid with high stability.
Example 6
Plant-derived herbicide containing 25% of sheep fatty acid
25 parts of sheep fatty acid, 5 parts of plant source synergistic agent, 14 parts of solvent, 5 parts of emulsifier, 6 parts of antifreezing agent and 45 parts of carrier.
The preparation method comprises the following steps:
(1) Weighing 14g of cyclohexanone in a 1000ml glass cup;
(2) Weighing 25g of sheep fatty acid, pouring into the glass cup and uniformly stirring;
(3) Weighing 5g of plant source synergist, placing 5g of alkylphenol ethoxylate and 6g of ethylene glycol in a container, and uniformly stirring while pouring into the container;
(4) Stirring the mixed solution uniformly;
(5) Homogenizing the obtained feed liquid, adding 45g of water in batches during the homogenizing process, and fully stirring to obtain uniform 25% caproic acid synergistic aqueous emulsion with high stability.
Example 7
Plant-derived herbicide containing 30% of sheep fatty acid
30 parts of sheep fatty acid, 3 parts of plant source synergistic agent, 20 parts of solvent, 5 parts of emulsifier, 3 parts of antifreezing agent and 39 parts of carrier.
The preparation method comprises the following steps:
(1) Cyclohexane 20g was weighed into a 1000ml glass;
(2) Weighing 30g of sheep fatty acid, pouring the sheep fatty acid into the glass, and uniformly stirring;
(3) Weighing 3g of plant source synergist, 5g of alkyl benzene sulfonic acid calcium salt and 3g of glycerol, placing into a container, and stirring uniformly while pouring into the container;
(4) Stirring the mixed solution uniformly;
(5) Homogenizing the obtained feed liquid, adding 39g of water in batches during the homogenizing process, and fully stirring to obtain uniform plant source herbicide containing 30% of sheep fatty acid with high stability.
Example 8
Plant-derived herbicide containing 30% of sheep fatty acid
30 parts of sheep fatty acid, 4 parts of plant source synergistic agent, 20 parts of solvent, 2 parts of emulsifier, 1 part of antifreezing agent and 43 parts of carrier.
The preparation method comprises the following steps:
(1) Weighing 20g of ethyl acetate in a 1000ml glass cup;
(2) Weighing 30g of sheep fatty acid, pouring the sheep fatty acid into the glass, and uniformly stirring;
(3) Weighing 4g of plant source synergist, placing 2g of Tween 80 and 1g of isobutanol in a container, and pouring the mixture into the container while stirring uniformly;
(4) Stirring the mixed solution uniformly;
(5) Homogenizing the obtained feed liquid, adding 43g of water in batches during homogenizing, and stirring thoroughly to obtain uniform plant source herbicide containing 30% of sheep fatty acid with high stability.
Example 9
Plant-derived herbicide containing 30% of sheep fatty acid
30 parts of sheep fatty acid, 5 parts of plant source synergistic agent, 20 parts of solvent, 3 parts of emulsifier, 4 parts of antifreezing agent and 38 parts of carrier.
The preparation method comprises the following steps:
(1) Weighing 20g of acetone in a 1000ml glass cup;
(2) Weighing 30g of sheep fatty acid, pouring the sheep fatty acid into the glass, and uniformly stirring;
(3) Weighing 5g of plant synergist, 3g of fatty alcohol ether sodium sulfate and 4g of ethylene glycol, placing into a container, and stirring uniformly while pouring into the container;
(4) Stirring the mixed solution uniformly;
(5) Homogenizing the obtained feed liquid, adding 38g of water in batches during the homogenizing process, and fully stirring uniformly to obtain 30% caproic acid synergistic aqueous emulsion with high stability.
The difference between comparative example 1 (20% capric acid aqueous emulsion) and example 1 is: the plant source herbicide is replaced by water, and the mass fraction of the sheep fatty acid in the plant source herbicide is 20%.
The difference between comparative example 2 (25% capric acid aqueous emulsion) and example 4 is: the plant source herbicide is prepared by replacing plant source synergistic agent with water, wherein the mass fraction of the caproic acid in the plant source herbicide is 25%.
The difference between comparative example 3 (30% capric acid aqueous emulsion) and example 7 is: the plant source herbicide is replaced by water, and the mass fraction of the sheep fatty acid in the plant source herbicide is 30%.
Comparative example 4 (20% caproic acid acetone solution): the mass fraction of the mixture of the sheep fatty acid and the acetone is 20%.
Comparative example 5 wolfberry extract.
Experimental example 1 laboratory in-house bioassay experiments
Indoor toxicity test of the caproic acid synergistic aqueous emulsion prepared in examples 1-9 by stem and leaf spray method
For the purpose of comparing the effect of the synergistic agent, the amounts of the herbicidal active ingredients of the sheep fatty acids in the examples were kept the same, 3g was taken in examples 1 to 3, 2.4g was taken in examples 4 to 6, and 2g was taken in examples 7 to 9; adding 20mL of water, and spraying.
Test material: herba Salicorniae Babylonicae, herba Eleusines Indicae: and (5) collecting seeds in the field and preserving.
Activity test of the agent on the suaeda salsa: seed soaking and sprouting of Suaeda salsa seeds, and spot sowing on soil with cross-sectional area of 0.25m 2 100 grains are sowed in each clinker pot, and 3 leaves of the erigeron breviscapus are cultivated in a greenhouse for 1 heart period to be treated. The plant-derived herbicides of examples 1 to 9 and comparative examples 1 to 5 were each applied at the above-designed dosage concentrations by using a hand-held compressed sprayer, and the soil was kept moist after the application. Each treatment was repeated 4 times, the fresh weight of the aerial parts of each treated erigeron breviscapus was weighed 15 days after the drug, and the fresh weight control effect (%) of each treatment was calculated according to the following formula:
E＝100×(C-T)/C
wherein: e is fresh weight control effect; c is the fresh weight of the overground parts of the control weeds; t is the fresh weight of the overground parts of the treated weeds;
activity test of the agent on goosegrass: seed soaking of herba Eleusines Indicae, accelerating germination, and dibbling at cross section of 0.25m filled with soil 2 The rest is the same as the clinker basin.
The toxicity of the plant-derived herbicides of examples 1 to 9 and comparative examples 1 to 5 was measured and statistically analyzed by the above method, respectively, and the results are shown in Table 1, in which the efficacy of the plant-derived herbicide (mass ratio of the sheep acid to the plant-derived synergist: 6.25:1) containing 25% of sheep acid of example 5 was improved by 9.8 times compared with that of the 25% of sheep acid aqueous emulsion.
TABLE 1 results of toxicity measurements of different caproic acid aqueous emulsion formulations on erigeron breviscapus
As is clear from Table 2, the efficacy of the plant-derived herbicide containing 25% of the capric acid (the mass ratio of the capric acid to the plant-derived synergist is 6.25:1) in example 5 is improved by 10.1 times compared with that of the 25% capric acid aqueous emulsion; example 9 plant-derived herbicide containing 30% of caprylic acid (weight ratio of capric acid to plant-derived synergist 6:1) was 9.7-fold higher than 30% of capric acid aqueous emulsion.
TABLE 2 results of toxicity measurements of different formulations of caproic acid aqueous emulsion on Eleusines Indicae
Indoor toxicity measurement results show that when compared with the comparison medicament, namely the caproic acid acetone solution and the caproic acid emulsion, the caproic acid and the plant source synergistic agent have the mass ratio of 6.25:1, the activity of the multiple herbicidal activity of the caproic acid is improved to the maximum, and the caproic acid can be subjected to field test so as to further define the prevention and control effects of the caproic acid on non-cultivated land and orchard weeds.
Experimental example 2 field test
Efficacy test of the plant-derived synergist-containing caproic acid herbicide prepared in example 5 in field for controlling uncultivated areas
Test agent: the plant-derived herbicide (a) of 25% caprylic acid of example 5, and the control agent was the aqueous 25% capric acid emulsion (b) of comparative example 2.
Test treatment and method: the medicaments a and b (24 ml each) are diluted 30, 60, 120 and 300 times, the clear water blank control (c) is treated for 5 times, each treatment is repeated for 4 times, and the cell area is 20m 2 Every 50cm interval between cells, the random block arrangement.
The application method comprises the following steps: the knapsack industrial pesticide-16 sprayer (operating pressure 0.3-0.4 MP, orifice caliber 0.8 mm) is adopted for applying the pesticide, and the dosage of the pesticide liquid is 675L/hm 2 . The application is carried out in sunny days, so that no precipitation is caused 24 hours after the application. The date and time of administration was recorded.
Investigation of control effect: the drug effect is investigated 15d after the drug, the weeding effect and the uniformity of the whole treatment area are firstly observed by visual inspection before the investigation, a diagonal 5-point sampling method is adopted, and each point is 0.25m 2 Investigating the type and plant number of residual weed, weighing fresh weight, and displaying the difference of total weeding effectThe results of the descriptive analysis are shown in Table 3 below.
TABLE 3 phytocide for 25% Caprae Seu Ovis acid control of unless cultivated land weeds-15 days after the drug
The field test result shows that the plant source herbicide based on the sheep fatty acid is a better medicament for preventing and controlling the weeds in the non-cultivated land, and has better prevention effect on the weeds such as green bristlegrass, small awning and the like.
Efficacy test of the plant-synergist-containing caproic acid herbicide prepared in example 9 in field for preventing and killing uncultivated areas
Test agent: the plant-derived herbicide (a) of 30% caprylic acid of example 9, and the control agent was 30% capric acid aqueous emulsion (b) of comparative example 3.
Test treatment and method: the medicaments a and b (20 ml each) are diluted 30, 60, 120 and 300 times, the clear water blank control (c) is treated for 5 times, each treatment is repeated for 4 times, and the cell area is 20m 2 Every 50cm interval between cells, the random block arrangement.
The application method comprises the following steps: the knapsack industrial pesticide-16 sprayer (operating pressure 0.3-0.4 MP, orifice caliber 0.8 mm) is adopted for applying the pesticide, and the dosage of the pesticide liquid is 675L/hm 2 . The application is carried out in sunny days, so that no precipitation is caused 24 hours after the application. The date and time of administration was recorded.
Investigation of control effect: the drug effect is investigated 15d after the drug, the weeding effect and the uniformity of the whole treatment area are firstly observed by visual inspection before the investigation, a diagonal 5-point sampling method is adopted, and each point is 0.25m 2 The types and plant numbers of residual weeds were investigated, fresh weights were weighed, and the total herbicidal effect was subjected to differential significance analysis, with the calculation results shown in table 4 below.
TABLE 4 fresh weight control efficacy of 30% Caprae Seu Ovis acid plant herbicide against non-cultivated land weeds-15 days after dosing
The field test result shows that the plant source herbicide based on the sheep fatty acid is a better medicament for preventing and controlling the weeds in the non-cultivated land, and has better prevention effect on the weeds such as green bristlegrass, small awning and the like.
The above embodiments are only for illustrating the present application, and are not limiting of the present application. While the application has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, and substitutions can be made thereto without departing from the spirit and scope of the application as defined in the appended claims.
Claims (8)
1. The plant-source herbicide is characterized by comprising the following components in parts by weight: 20-30 parts of caproic acid, 2-5 parts of plant source synergistic agent, 10-20 parts of solvent, 2-5 parts of emulsifier, 1-6 parts of antifreezing agent and 38-62 parts of carrier; the plant source synergistic agent is a medlar extract, and the preparation method of the medlar extract comprises the following steps:
(1) Drying the whole Chinese wolfberry, crushing and sieving to obtain a Chinese wolfberry crushed material;
(2) Soaking the ground Chinese wolfberry fruit in water and shaking the ground Chinese wolfberry fruit to obtain an aqueous Chinese wolfberry fruit extract;
(3) Concentrating the fructus Lycii water extractive solution with rotary evaporator to obtain the fructus Lycii extract.
2. The plant-derived herbicide according to claim 1, characterized in that it comprises the following components in parts by weight: 25 parts of sheep fatty acid, 4 parts of plant source synergistic agent, 14 parts of solvent, 5 parts of emulsifier, 3 parts of antifreezing agent and 49 parts of carrier.
3. The plant-derived herbicide according to any one of claims 1 to 2, wherein the solvent is one or more of acetone, ethyl acetate, cyclohexane, cyclohexanone; and/or the emulsifier is one or more of Tween series, alkylphenol ethoxylates, phenethyl phenol ethoxylates, alkylbenzene sulfonic acid calcium salt and fatty alcohol ether sodium sulfate; and/or the antifreezing agent is one or more of glycol, glycerol and isobutanol; the carrier is water.
4. A plant-derived herbicide according to claim 3, in the form of an aqueous emulsion, a emulsifiable concentrate, a microemulsion or a suspoemulsion.
5. A method for preparing the plant-derived herbicide of any one of claims 1-4, comprising the steps of:
(1) Weighing the solvent in a container;
(2) Weighing caproic acid, pouring into the container, and stirring uniformly to obtain a mixed solution A;
(3) Weighing plant source synergistic agent, emulsifying agent and antifreezing agent, placing in another container, pouring into the container, stirring uniformly to obtain mixed solution B;
(4) Uniformly stirring the mixed solution A and the mixed solution B to obtain mixed solution C;
(5) Homogenizing the mixed solution C, adding carrier during homogenizing, and stirring to obtain uniform plant source herbicide with high stability.
6. Use of a plant-derived herbicide as defined in any one of claims 1 to 4 or a plant-derived herbicide prepared by the method of claim 5 for controlling weeds.
7. The use according to claim 6, wherein the weeds are broadleaf weeds, sedge weeds or grasses.
8. The use according to claim 7, wherein the broadleaf weed is a erigeron breviscapus; the grass weeds are goosefoot, semen Euphorbiae and green bristlegrass.
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